Correct option is C
Detention basins are not typically used as a flood-proofing measure for individual houses. Instead, they are used in urban planning and stormwater management systems to temporarily store rainwater and reduce flood risk in larger areas, such as cities or communities.
Flood-proofing measures for houses generally aim to protect individual buildings from floodwaters.
Explanation of Options:
1. Dry flood proofing:
Dry flood proofing involves techniques like sealing buildings and installing barriers to prevent floodwater from entering. It is a direct flood-proofing measure for individual homes.
2. Flood walls:
Flood walls are physical barriers built around homes to prevent floodwaters from entering.
3. Detention basins:
Detention basins are typically used to manage stormwater in larger areas, not for flood-proofing individual houses.
4. Elevation:
Elevating a building above expected flood levels is one of the most effective flood-proofing methods for individual homes.
